Hi there...New Poster....I planted about 30 Cotoneaster last year, and was wondering when, or if, I need to prune them. They are about 2 1/2 feet to 3 feet tall, and have about 3 limbs on each plant. They are planted about 20 inches apart. Having never dealt with a young hedge before, I am unsure as to how to care for them. Any help is greatly appreciated. Thanks Guys!